Flying Magazine Article From March 2017
This article refers to a flight in which both pilots almost lost consciousness due to toxic air in the cockpit - press ‘read more’ to see the complete article:
https://www.flyingmag.com/jumpseat-can-cabin-air-be-toxic

This is the report from The Aviation Herald regarding that flight:
https://www.avherald.com/h?article=4b6eb830&opt=0

This is the subsequent report from The Aviation Herald regarding the FAA’s lack of knowledge of any details about this event (rated as an accident) and the questions asked by The Aviation Herald:
https://www.avherald.com/h?article=4b6eb830/0006&opt=0

If you are prepared to read all of the articles and the whole truth into this story please FASTEN YOUR SEATBELTS because what you read may be disturbing.